Steam-generator.



No. 643.368. Patented Feb. I3, 1900.

' G. H, WATSON.

STEAM GENERATOR.

(Application filed Man 9. 1898. Renewed Jan 17, 1900) (Ho Modem itsTATES ATEN'I FFICE.

GEORGE II. \VATSOIET, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TOEDWIN J. NOBLE, OF SAME PLACE.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 643,368, dated February13, 1900.. Application filed March 9, 1898. Renewed January 17, 1900.Serial No. 1,797. 1N0 model.)

T0 crZZ whom it may concern.-

Be it known that I, GEORGE H. WATSON, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Steam-Generators and Ido hereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

It is the object of this invention to improve the arrangement andconstruction of the circulating devices for steam-generators in suchmanner as to afford easy and ready access for inspection, cleaning, andrepairs and to hasten the generation of steam and accomplish the bestresults in the economy of fuel.

My invention consists in the combination, with a steam-boiler and asediment-collector located outside and at the rear of the boilersettingor furnace, of a header or headers situated outside the furnace betweenits rear wall and the sediment-collector and communicating with an upperpart of the sedimentcollector, tubes having their rear ends expandedinto openings in the front of said header or headers in line with rearopenings that are closed by caps or plugs, the said tubes being extendedforward through the rear furnace-wall and through the combustion-chamberto connect with an upper forward portion of the boiler, and a returnpipe or tube leading from a lower rear portion of the boiler andcommunicating with a lower portion of the sediment-collector, all ashereinafter described and claimed.

In the annexed drawings, illustrating the invention, Figure 1 is apart-sectional side elevation of my improved steam generator. Fig. 2 isa plan of the circulating devices. Fig. 3 is a front elevation of thesteam-generator with the furnace-front removed.

The boiler 1 may be of ihe'ordinary horizontal type, provided withinternal fire-tubes. Outside the rear furnace Wall 2 there is placed asediment-collector 3, that is preferably of upright cylindrical form.The sediment-collector 3 is located at such distance from the rearfurnace-wall 2 as to allow ample room for access to atransversely-arranged header or headers 4, located between the saidfurnace wall and the said collector. By means of pipes 5, elbows 6 7,and couplings 8 communication is established between the header orheaders 4 and an upper portion of the sediment-collector 3, on oppositesides thereof. While I have shown, preferably, two headers locatedtransversely in line with each other outside the rear furnace-wall, itwill be obvious that a single header of suitable length might bearranged to occupy the space of the two headers.

In the front of the header or headers 4 there are suitable openings intowhich are expanded the rear ends of forwardly-extended circulating andsteam-generating tubes 9, that are passed through the rear furnace-walland through the combustion-chamber 10 and thence above the bridge-wall11 and grate 12 to connect with a header orheaders 13 at the forwardlower portion of the boiler. These forward headers 13 connect, by meansof elbows 14, pipes 15, and suitable couplings 16, with the forwardupper portion of the boiler, preferably as shown or in any otherconvenient and appropriate manner.

The circulating and steam-generating tubes 9 should be of such characteras to be capable of easy and convenient expansion into appropriateopenings provided in the rear headers 4: and forward headers 13, each ofwhich is also provided with openings closed by caps or plugs 17 and 18,respectively, arranged in line with the several circulating-tubes 9, soas to facilitate the work of expanding said tubes into the headers andto afford conveniently ready access for inspection, cleaning, andrepairs of'the tubes and their headers.

It is preferable to have the circulating and steam-generating tubes 9straight throughout their length that they may more readily perlnit thepassage of cleaning instruments or devices. They are preferably somewhatinclined in an upwardly and forward direction to promote circulationfrom the sediment collector to the forward upper portion of the boiler.Anyconvenientnumberofsuchtubes may be employed, so that by the extent ofsurface exposed in the passage of such tubes through thecombustion-chamber and above the grate there will be a correspondingincrease in the rapidity of circulation and steam generation.

By locating the rear header or headers 4; outside the rear furnace-Walland providing ample room for access to the caps or plugs 17 the tubes 9can be readily cleaned as frequently as may be necessary and at thepoint where they would be most likely to become clogged or obstructed.

To complete the circulation, a pipe connection 19 is arranged to leadfrom a lower rear part of the boiler 1 to the sediment-collector 3 belowwhere it connects with the rear headers. Thesediment-collector isprovided with the usual blow-off devices and may have an inlet forfeed-water, or the feed-water may be introduced into the boiler direct,if so pre-' ferred.

Between the furnace-front 20 and lower forward portion of the boiler 1there is a screen or partition 21, of tile or suitable refractorymateriahto divert the products of combustion rearward along thecirculating and steam-generating tubes-L9 and to the rear end of theboiler to pass out throughthe usual fire-tubes therein.

The described arrangement and construction of circulating devices notonly afford the greatest convenience of access for frequent inspectionand forany necessary cleaning and repairs, but will so promote thecirculation asto greatly diminish theusual liability to incrustationorscale. Any sediment or scale that may collect will be rapidly removed,and a rapid generation of steam will be effected with large economy offuel.

What I claim as my invention is The combination with a steam-boiler, thefurnace, and a number of heating and circulating pipes or tubes arrangedin the combus tion-chamber directly beneath the boiler and extendedthrough the rear furnace-wall, of a forward header or headers into whichthe forward ends of said pipes or tubes are expanded, pipes or tubesconnecting said header or headers with an upper forward portion of theboiler, a sediment collector located outside the rear furnace-wall, arear header or headers between said sediment-collector and the rearfurnace-wall and into which the rear ends of said heating andcirculating pipes or tubes are expanded, pipes or tubes connectingsaidrear'header or headers Withan upper part of the sediment-collector, thesaid forward head ers and rear headers being each provided wit-hopposite openings in line with said circulating pipes or tubes,-caps orplugs closing said openings, and a pipe connecting the rear lower partof the boiler with a lower portion of the sediment-collector,substantially as described.

In testimony whereof I affix my signature in'presence of two witnesses.

GEORGE H. WATSON.

Witnesses:

A. R. BROWN, NATHAN H. ROBBINS.

